PPC ad copy refers to the text in paid search ads — particularly Google Ads — including headlines (up to 15 headlines in Responsive Search Ads, displayed three at a time), descriptions (up to 4 descriptions, displayed two at a time), and display path text. Effective ad copy is specific (mentioning the keyword, location, or offer), differentiated (why your company over competitors), and action-oriented (clear call to action). Google's Responsive Search Ad format tests headline and description combinations automatically, serving the versions that generate the best click-through rates for each query context.
Ad copy is one of the most impactful levers in Google Ads — directly affecting click-through rate (which affects Quality Score, which affects CPCs and Ad Rank) and the initial impression a potential customer has of your brand. Generic ads ('Our services | Quality guaranteed | Contact us today') get passed over for specific, compelling ads that directly address the searcher's need.
Writing effective Google Ads headlines
- Include the keyword — 'London Solicitors | Commercial Law Experts' matches the search intent explicitly
- Lead with the primary benefit — 'Cut Your Tax Bill Legally | ACCA Qualified Accountants'
- Include a differentiator — 'Same-Day Response | No Win No Fee | FCA Regulated'
- Use numbers where credible — '500+ UK Clients | 20 Years Experience | 98% Success Rate'
- Create urgency where honest — 'Limited January Offer | Free Initial Consultation Until 31 Jan'
- Include a call to action — 'Book Free Demo', 'Get Instant Quote', 'Call Now'
- Test location-specific variants — 'Manchester Plumbers | Out in 60 Minutes' for location-targeted campaigns
- Pin critical headlines — use RSA pinning to ensure key messages always appear in specific positions
Responsive Search Ads (RSAs) are Google Ads' current standard text ad format. Advertisers provide up to 15 headlines and 4 description lines. Google's AI tests different combinations of headlines and descriptions, showing three headlines and two descriptions at a time in the ad. Over time, Google learns which combinations generate the highest CTR and conversions for different users and contexts, serving the best-performing combinations more frequently. RSAs replace the older Expanded Text Ads format and offer more testing surface area at the cost of some control over which combinations appear.
Each ad group should have at minimum one Responsive Search Ad with all 15 headlines and 4 descriptions filled with varied, distinct copy. Using all 15 headlines (rather than just the minimum 3) gives Google's AI more combinations to test, improving the likelihood of finding high-performing variants. Some advertisers run two RSAs per ad group with different messaging approaches (e.g. one price-focused, one quality-focused) to test whether different positioning resonates with different segments of the audience.